| Risk | Description | |------|-------------| | | Bacteria breeding in trapped organic matter (e.g., Listeria , Salmonella ). | | Structural damage | Leaking from joints, foundation cracks, or burst pipes due to back pressure. | | Fatbergs (sewers) | Municipal sewer blockages costing millions to remove (e.g., London “Whitechapel Fatberg” – 130 tonnes). | | Legal fines | Businesses discharging FOG without a grease trap face regulatory penalties. | | Flooding | Sewage backflow into property – costly remediation. |